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Preparation method of amorphous alloy coating used for radiation protection of nuclear waste container

An amorphous alloy and radiation protection technology, which is applied in metal material coating process, coating, fusion spraying, etc., can solve the problems of low hardness of the coating, low bonding force between the coating and the substrate, and high friction coefficient. Effect of reducing porosity, excellent neutron absorption capacity, and improving binding force

Inactive Publication Date: 2020-05-12
上海离原环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are still no domestic reports on the application of supersonic sprayed amorphous alloy coatings in the field of radiation protection for nuclear waste containers, and the amorphous alloy coatings prepared by domestic scientific research and enterprises in other application fields still have low coating hardness (dimensional The hardness is generally between 530 and 950HV), the amorphous content is low (below 80%), the bonding force between the coating and the substrate is not high (between 25 and 45MPa), the boron content is low (atomic content is below 15%), and the friction coefficient High (above 0.4) and other deficiencies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The method for preparing an amorphous alloy coating for radiation protection of nuclear waste containers in this embodiment comprises the following steps:

[0023] S1: Al with a mass percentage ratio of 20%:80% 2 o 3 The powder and the Fe-Cr-C-Si-Gd-B iron-based amorphous alloy powder are mixed with a high-speed mixer, the mixing power is 20kW, the rotating speed is 4000 rpm, and the mixing time is 120min to obtain a mixed powder;

[0024] S2: Ultrasonic sieving of the mixed powder obtained in S1 using high-power ultrasonic waves to obtain Al 2 o 3 Powder and iron-based amorphous alloy composite powder can achieve the effect of destroying agglomeration and uniform dispersion. The working frequency is 30-40KHz and the time is 20min;

[0025] S3: Al to be prepared 2 o 3 The powder and iron-based amorphous alloy composite powder are put into an oven for drying to remove the moisture in the powder and prevent the powder from generating pores during the heating spraying...

Embodiment 2

[0043] The method for preparing an amorphous alloy coating for radiation protection of nuclear waste containers in this embodiment includes the following steps:

[0044] S1: Al with a mass percentage ratio of 20%:80% 2 o 3 The powder and the Fe-Cr-C-Si-Gd-B iron-based amorphous alloy powder are mixed with a high-speed mixer, the mixing power is 20kW, the rotating speed is 4000 rpm, and the mixing time is 120min to obtain a mixed powder;

[0045] S2: Ultrasonic sieving of the mixed powder obtained in S1 using high-power ultrasonic waves to obtain Al 2 o 3 Powder and iron-based amorphous alloy composite powder can achieve the effect of destroying agglomeration and uniform dispersion. The working frequency is 30-40KHz and the time is 20min;

[0046] S3: Al to be prepared 2 o 3 The powder and iron-based amorphous alloy composite powder are put into an oven for drying to remove the moisture in the powder and prevent the powder from generating pores during the heating spraying ...

Embodiment 3

[0065] The method for preparing an amorphous alloy coating for radiation protection of nuclear waste containers in this embodiment comprises the following steps:

[0066] S1: Al with a mass percentage ratio of 20%:80% 2 o 3 The powder and the Fe-Cr-C-Si-Gd-B iron-based amorphous alloy powder are mixed with a high-speed mixer, the mixing power is 20kW, the rotating speed is 4000 rpm, and the mixing time is 120min to obtain a mixed powder;

[0067] S2: Ultrasonic sieving of the mixed powder obtained in S1 using high-power ultrasonic waves to obtain Al 2 o 3 Powder and iron-based amorphous alloy composite powder can achieve the effect of destroying agglomeration and uniform dispersion. The working frequency is 30-40KHz and the time is 20min;

[0068] S3: Al to be prepared 2 o 3 The powder and iron-based amorphous alloy composite powder are put into an oven for drying to remove the moisture in the powder and prevent the powder from generating pores during the heating spraying...

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Abstract

The invention discloses a preparation method of an amorphous alloy coating used for radiation protection of a nuclear waste container. The preparation method comprises the following steps that Al2O3 powder and Fe-Cr-C-Si-Gd-B iron-based amorphous alloy powder are mixed through a high-speed mixer; high-power ultrasonic waves are used for carrying out ultrasonic screening on mixed powder; Al2O3 andiron-based amorphous alloy composite powder is dried; and the composite powder is directly sprayed to the surface of the nuclear waste container through a high velocity oxy-fuel method. By means of the preparation method of the amorphous alloy coating used for radiation protection of the nuclear waste container, the bonding force, density, amorphous content and wear resistance of the Fe-Cr-C-Si-Gd-B iron-based amorphous alloy composite coating and the nuclear reactor waste container are improved, the porosity of the amorphous alloy composite coating is reduced, and meanwhile the coating has excellent neutron absorbing ability.

Description

technical field [0001] The invention specifically relates to a method for preparing an amorphous alloy coating used for radiation protection of nuclear waste containers. Background technique [0002] Generally, each million-kilowatt-class nuclear power unit can unload 25 tons of spent fuel per year. At present, the accumulated spent fuel in my country has reached more than 1,000 tons. At present, most of the spent fuel storage methods at home and abroad adopt "wet" storage (that is, storing spent fuel on the grid of the pool) and "dry" storage. The dry storage container has the functions of storing and transporting spent fuel. The spent fuel unloaded from the nuclear reactor is extremely radioactive, accompanied by a certain neutron emission rate, and needs to be stored in the spent fuel pool for a period of time, so that most of the radionuclides with short half-lives decay away and take away their decay hot. The materials used to process spent fuel not only require high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/129C23C4/06C22C45/02
CPCC22C45/02C23C4/06C23C4/129
Inventor 李朝明潘文高李运红禹兴利
Owner 上海离原环境科技有限公司
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